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Updated: Jun 20, 2026

Quantitative 31P NMR Analysis of Lignins and Tannins
Published on: August 2, 2021
Monomeric and dimeric hydrolysable tannins of Tamarix nilotica
Mohamed A A Orabi1, Shoko Taniguchi, Tsutomu Hatano
1Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Tsushima, Okayama 700-8530, Japan.
Abstract:
An ellagitannin monomer, nilotinin M1 (1), and three dimers, nilotinins D1 (2), D2 (3), and D3 (4), were isolated from leaves of Tamarix nilotica (Ehrenb.) Bunge. Structures were elucidated based on analysis of spectroscopic data and chemical correlations with known compounds. In addition, six known tannins, hirtellin A (5) (dimer), remurin A (6), remurin B (7), 1,3-di-O-galloyl-4,6-O-(S)-hexahydroxydiphenoyl-beta-D-glucose (8), gemin D (9), and hippomanin A (10) (monomers), were isolated for the first time from this plant species. The reported (13)C NMR assignments of the dehydrodigalloyl moiety and glucose cores of 5 are revised, and the (13)C NMR spectroscopic data for 6 and 7 are also reported for the first time.
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